Vortex states in heavily Pb-substituted Bi2Sr2CaCu2O8+y, (BSCCO) with plana
r defects (PDs) from overdoped to underdoped region is studied using micro
Hall probes. Angular dependence of magnetization reveals that in a restrict
ed angle and field region, magnetization first increases when the field is
tipped away from the c axis and then decreases again. This is understood as
a manifestation of vortex channeling along the PDs. In addition, we observ
e an enhancement of magnetization (peak effect) at nearly constant c-axis c
omponent of the field and the peak field is almost independent of temperatu
re and the doping level. The peak field has systematic correlation with the
average spacing of PDs suggesting that a kind of matching effect is respon
sible for this phenomenon.